exim4 running at 2.2.2.2 but also have .3 .4 .5 and .6 on the system
IP 1.1.1.1 is enabled for full-relay through the exim

I need to assign 2.2.2.3 for external mails for that IP - I have configured exim to use .3 for domain relay.domain.ltd (if send mails from the webserver the right IP is used - 2.2.2.3) but the relayed host goes through default IP (I'm using From: and Return: xx@relay.domain.ltd)